Improved machine foe dressing grindstones, mineeals



e .e @uitrit tats e iid-aient @Hire Letters Patent No.`79,990, datedJuly 14, 18.68.

IMPROVED MACHINE FOB. DRESSING GRINDSIONES, MINERALS, Gto.

Elige behule referat mit tiges @litters gintmt mit lurking @mit nf thetame.

T0. ALL WHOM IT MAY CONCERN:

Beit known that I', PHILIP LEONARD, of Sharon, in the county of Mercer,and'State of Pennsylvania, have invented a new and improved Machine forDressing Grindstones; and I do hereby declare that the following is afull, clear,and exact description thereof, which will enable othersskilled iin the art to make and use the same, reference being'h'ad totheaccompanying drawings, forming part of this'spe'ciiication. v

This invention relates to a new and improved machine for dressinggrindstones, and wheels or cylinders of V.'inyimineral composition forgrinding, polishing, Ste.

The invention consists in` having a cutting-tool, fitted in a suitablestock, placed on parallel ways, and arranged in such' a mannerthat thetool-stock may bemoved in a direction parallel with the axis of thestone to be dressed, andthe ways placed in a frame arranged in such amanner that the tool-stock may be moved towards and from the stone, allarrangedias hereinafter fully shown and described, whereby a grindstone'may have its face dressed very expeditiously and inl aperfect-manner.'A

In the accompanying sheet of drawingsi v Figure 1"is a longitudinalvertical section of myinventicn, taken in the line :r zu, iig. 2.

Figure 2,-'a transverse vertical section ofthe same, taken in the-liney, iig. 1.

Similar letters ofv reference-indicate `corresponding parts.

A represents afra-me, provided orY formed at its front with twouprights, a a, having verticalislots, b, in

`their upper ends, in' which journals c, at the front Aendof a frame, B,are tted, the rearend of said `frame being provided with screws cl d,one near each side, said screws passing through oblong slots, e, in theupper parts of uprights'f of frame A. AThis arrangement admits'ofjtheframe B beingV adjusted at -vagreater or less angle of inclination, asmay he desired, and which will be fully understood byI referring to iig.1.

The frame`B has two parallel ways., kg g, attachedon which a frame, C,is iitted, and allowed to slide freely 4in a forward and backwarddirection. vQn this frame() there are twoparallel ways, g' g onwhieh isplaced a stock, C', having a pinion, E, fitted in its lower part,saidpinion beingattached to a shaft, F, which extends back to the rearof frame A, and has a. thumblwheeljt, on its rear end.l The pinionErgears into a` rack, D, which extends the entire length of frame Q.By'turning this shaft I", the stool-stock C may be'moved from one sideof frame C to .the other.

The tool G may be 'ofsteel o r sheet iron, and is secured in the stoekGby a set-screw, z'.

TheframeC is moved forward and backward on frameB by means of ascrew-shaft, H.

By thisv arrangementn'it will. be seen that the'tool G may beadjusteditowards and from the periphery of the stone to `be dressed, andalso moved laterally across the face of the same, and, the stoneA beinghung on an axis parallel with tli'e ways 'g' g of the tool-stock C', thestone, as it is rotated, and the tool G properly moved or adjusted, mustcause the face of the stone to he dressed perfectly smooth andvparallelwith the axis of` the stone.

Having'thus described my invention, what I claim as new, and desire tosecure by Letters Patent, iis- Theadjustable frame B, fitted inl a.frame, lA, as shown, in combination with the sliding frame C, providedwith the tool-stock C', arranged for a lateral movement, substantiallyasand for-the purpose set forth.

The above specification of my invention signed by me, this 14th-day ofApr't1,`1868.

` PHILIP LEONARD.

Witnesses:

A BNER APPLEGATE, E. T. Hines.

